Physiology 2130 Lecture 4: Module 4 study guide
8 Dec 2016
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Module #4 nerve cells (sections 4. 1 to 4. 31) Learning objectives: explain the difference between excitable and non-excitable cells. Excitable cells can use the resting membrane potential to generate. Of the nervous system because this is the way never cells communicate and. Are necessary for muscle contractions: draw and label the soma, axon, dendrites, axon hillock, myelin sheath, nodes of ranvier, and terminal boutons (axon terminals) of a typical neuron, describe the voltage-dependent sodium and potassium channels. These channels are essential to generating an action potential. Channels are sensitive to changes in the membrane potential and open when. The inside of the cell becomes more positive ( -70mv to -60mv, depolarization) Gate closed: channel is now ready to open again. During the period when the inactivation gate is closed, the channel will not. Potassium channels: depolarization of membrane occurs, after a brief pause, k voltage-gated channels open 9unlike na, which open.
